<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">

function boom()
{
  var i = document.getElementById("i");
  i.contentDocument.designMode = "on";
  i.previousSibling.data += "x\n";
  i.style.counterReset = "c";
}

</script>
</head>

<body onload="boom();">&#x202E;<iframe id="i" src="data:text/html,a"></body>

</html>
